Other
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.4547h&link_type=abstract
Journal of Geophysical Research, vol. 82, Sept. 30, 1977, p. 4547-4558.
Other
33
Landing Sites, Magnetic Properties, Mars Surface, Particulate Sampling, Viking Lander Spacecraft, Granular Materials, Igneous Rocks, Mars Landing, Minerals, Mission Planning, Viking Mars Program
Scientific paper
Three permanent magnet arrays were mounted on each Viking lander: a strong array fixed on a photometric reference test chart on top of the landers; and two arrays, one strong and one weak, incorporated into the backhoe of the surface sampler. Some or all of the magnetic particles detected could be highly magnetic unoxidized mineral grains (metallic Fe, magnetite, pyrrhotite) forming the core beneath a reddish coating of limonite or hematite; or grains composed of gamma-Fe2O3, with and without other iron oxides; or igneous rock (or mineral particles) which consist of an admixture of unweathered silicate material or minerals with a significant fraction of highly magnetic phase, again with a reddish coating; they could be also igneous rock or mineral particles, intrinsically nonmagnetic, but having a reddish coating containing gamma-Fe2O3; or clay mineral particles which contain and/or are coated with Fe2O3, of which a substantial fraction is in the gamma-Fe2O3 form.
Arvidson Ray E.
Collinson D. W.
Hargraves Robert B.
Spitzer R. C.
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